Dan Dare Posted March 28, 2019 Share Posted March 28, 2019 8 hours ago, xgsjx said: Alex of Barefaced once said that he blew a larger watt rated driver with a relatively small amp. Watts in a speakers rating are the thermal measurement for the voicecoil (how much heat it can take). That's usually caused by the fact that a low powered amp will clip and send what is pretty well a square wave to the driver, which destroys it. Quote Link to comment Share on other sites More sharing options...
barkin Posted March 28, 2019 Share Posted March 28, 2019 (edited) This old chestnut again... https://barefacedbass.com/technical-information/mythbusters1.htm Edited March 28, 2019 by barkin . 1 Quote Link to comment Share on other sites More sharing options...
bassmayhem Posted March 29, 2019 Share Posted March 29, 2019 I kinda like mine... 3 Quote Link to comment Share on other sites More sharing options...
TheGreek Posted May 6, 2019 Share Posted May 6, 2019 Thread divergence....what do you think of the Spartan? I loved the cabs - sold - there must be something modern that's as good as my beloved Trace Elliot - or am I searching for the unobtainable??? 1 Quote Link to comment Share on other sites More sharing options...
Al Krow Posted May 6, 2019 Author Share Posted May 6, 2019 On 19/03/2019 at 21:05, Bobthedog said: Personally I would add the Glockenklang Blue Rock. The sound may be a bit modern for some, however, I have yet to see an amp that matches the build and sound quality of this one. And following hard on the heels of Mick's timely thread divergence, there are a couple of Glocks in the FS too, right now including a Blue Rock. Modern = hi-fi? Quote Link to comment Share on other sites More sharing options...
ped Posted May 6, 2019 Share Posted May 6, 2019 Just wanted to make sure my mate dUg gets a mention on this page. dUg 1 Quote Link to comment Share on other sites More sharing options...
Al Krow Posted May 6, 2019 Author Share Posted May 6, 2019 (edited) 25 minutes ago, ped said: Just wanted to make sure my mate dUg gets a mention on this page. dUg How is he your 'mate'? You've been keeping that particular relationship very quiet 😉 Besides the dUg's biggest fan, who unlike me can do clever things like spell his name right, is already one step ahead of you... On 20/03/2019 at 08:35, Cuzzie said: How good amps are aside, the thing about EQ’s is knowing to use them. A 4 or 5 band EQ is not necessarily better than a 3 band Baxendall or a classic Fender Tone Stack. I agree about tone tone tone, and essentially it’s the same with coloured and non coloured cabs - you may preferentially want an amp to be less coloured as you have something before it giving you the sound you want. In this case, the amps you mention are fine beasts and nearly as good as the Tech21! Edited May 6, 2019 by Al Krow Quote Link to comment Share on other sites More sharing options...
Bobthedog Posted May 6, 2019 Share Posted May 6, 2019 1 hour ago, Al Krow said: And following hard on the heels of Mick's timely thread divergence, there are a couple of Glocks in the FS too, right now including a Blue Rock. Modern = hi-fi? That is probably a fair description, however, I know Roland Rock uses his for reggae, so lashings of delicious thick bass too. Sadly mine too will be up for sale too sometime soon as I need to clear the decks for a move abroad. Quote Link to comment Share on other sites More sharing options...
Osiris Posted May 7, 2019 Share Posted May 7, 2019 15 hours ago, ped said: Just wanted to make sure my mate dUg gets a mention on this page. dUg Around these parts a dUg is an animal that some folks keep as pets. "Arya seen air ole man?" "Yu' he's tekkin' the dUg fra walk then eez goowin um f' summu' twet" 2 Quote Link to comment Share on other sites More sharing options...
Cuzzie Posted May 7, 2019 Share Posted May 7, 2019 You knurrr nuffin Sid Snurrrw Quote Link to comment Share on other sites More sharing options...
la bam Posted May 8, 2019 Share Posted May 8, 2019 I'm not sure its class d, but for the sake of this thread I'm presuming class d is anything not valve, most, solid state, class a/b etc, but the Quilter 800 bass block is fantastic. Light as a feather, loud as anything, brilliant take on the eq settings, and lovely tone. Works brilliantly with the helix stomp too. Quote Link to comment Share on other sites More sharing options...
Al Krow Posted May 8, 2019 Author Share Posted May 8, 2019 (edited) 48 minutes ago, la bam said: I'm not sure its class d, but for the sake of this thread I'm presuming class d is anything not valve, most, solid state, class a/b etc, but the Quilter 800 bass block is fantastic. Light as a feather, loud as anything, brilliant take on the eq settings, and lovely tone. Works brilliantly with the helix stomp too. Apologies if this is teaching anyone to 'suck eggs' but as you said you were not sure... Class D is solid state. It's not 'digital' which is a common (and reasonable!) misunderstanding given the 'D'. The Quilter absolutely is Class D. Class A/B is also SS and the precursor to Class D. It tends to be a heavier power module than Class D and a lot of folk attribute it to having more 'heft'. Then there is the 'Trans class' (Mosfet) SS which my Mesa M6 is, but I lump that in with Class A/B to keep it simple in my head! I guess the key feature of Class D is the clear combination of light weight and power. Which is why they have taken the amp world by storm and left bass valve amps and class A/B amps to folk who appreciate the finer things in life. And I'm definitely not knocking them, but my back has had a big say in things... Edited May 8, 2019 by Al Krow Quote Link to comment Share on other sites More sharing options...
Stub Mandrel Posted May 8, 2019 Share Posted May 8, 2019 On 19/03/2019 at 20:15, Al Krow said: Middle aged spread can signify a whole load of medical ills. It's definitely not a laughing matter. Surely Flora is the Middle Age Spread?* *I'm allowed to laugh having fought MAS and won a sensible cholesterol level as a result... 1 Quote Link to comment Share on other sites More sharing options...
Stub Mandrel Posted May 8, 2019 Share Posted May 8, 2019 After a conversation yesterday I'm seriously considering sticking a generic class D module in my ancient Laney Pro-Bass together witha an SMPSU to lose a lot of weight and gain a lot of headroom. Quote Link to comment Share on other sites More sharing options...
Cuzzie Posted May 8, 2019 Share Posted May 8, 2019 1 hour ago, Al Krow said: Apologies if this is teaching anyone to 'suck eggs' but as you said you were not sure... Class D is solid state. It's not 'digital' which is a common (and reasonable!) misunderstanding given the 'D'. The Quilter absolutely is Class D. Class A/B is also SS and the precursor to Class D. It tends to be a heavier power module than Class D and a lot of folk attribute it to having more 'heft'. Then there is the 'Trans class' (Mosfet) SS which my Mesa M6 is, but I lump that in with Class A/B to keep it simple in my head! I guess the key feature of Class D is the clear combination of light weight and power. Which is why they have taken the amp world by storm and left bass valve amps and class A/B amps to folk who appreciate the finer things in life. And I'm definitely not knocking them, but my back has had a big say in things... It’s probably a lot easier to look purely at solid state vs Vacuum Tube amplifiers. Once in each area then you can break down the why’s and where fores. Class A goes through to about T and within these classes is all about your transistors, dissipation Of heat, how much gain to bring into the signal. Class A to C have various degrees of just under 180 degrees of conduction through to 360 degrees Class D to T use non linear on off switching. All this leads into efficiency, power loss, distortion of signal. Vacuum tubes need power voltage, more heat dissipation and are very linear, hence ‘cranking’ to get the break up, obviously you need a few to ramp up the signal. Mesa call them themselves ‘Trans class’ and have trademark by it, it’s just a bunch of transistors really. It’s not necessarily A/B but it will have its own characteristics. 1 Quote Link to comment Share on other sites More sharing options...
Count Bassy Posted May 8, 2019 Share Posted May 8, 2019 Not forgetting Class H, which switches to a higher power rail voltage when the demand calls for it. (thus reduces heat dissipation at lower output levels) Quote Link to comment Share on other sites More sharing options...
Count Bassy Posted May 8, 2019 Share Posted May 8, 2019 (edited) 5 hours ago, Al Krow said: Class D is solid state. It's not 'digital' which is a common (and reasonable!) misunderstanding given the 'D'. Ah, that old chestnut again. I disagree with this because the output from the power amplifier side, in it's raw state is either on or off, hence digital, even if the cotrolling mechanism is analogue. Edited May 8, 2019 by Count Bassy Quote Link to comment Share on other sites More sharing options...
Stub Mandrel Posted May 8, 2019 Share Posted May 8, 2019 (edited) 31 minutes ago, Count Bassy said: Ah, that old chestnut again. I disagree with this because the output from the power amplifier side, in it's raw state is either on or off, hence digital, even if the cotrolling mechanism is analogue. That makes my light switch digital control... I suppose I work it with my finger! Edited May 8, 2019 by Stub Mandrel 1 Quote Link to comment Share on other sites More sharing options...
Al Krow Posted May 8, 2019 Author Share Posted May 8, 2019 13 minutes ago, Stub Mandrel said: That makes my light switch digital control... I suppose I work it with my finger! Ok that is funny. But is it a fair comparison to what @Count Bassy was saying? Quote Link to comment Share on other sites More sharing options...
Stub Mandrel Posted May 8, 2019 Share Posted May 8, 2019 40 minutes ago, Al Krow said: Ok that is funny. But is it a fair comparison to what @Count Bassy was saying? Yes, if the criteria for digital is that something that works by having only an 'on' and 'off' state is digital, it is a fair point. Actually class D amps switch between three states you could call 1, 0 and -1. Personally, although class D amps lend themselves to direct digital control, I wouldn't class them as any more digital than PWM motor controllers (in fact I am sure you could use them as voltage controlled motor controllers if they are modified to be DC coupled). 1 Quote Link to comment Share on other sites More sharing options...
Chienmortbb Posted May 10, 2019 Share Posted May 10, 2019 On 08/05/2019 at 10:55, Al Krow said: Apologies if this is teaching anyone to 'suck eggs' but as you said you were not sure... Class D is solid state. It's not 'digital' which is a common (and reasonable!) misunderstanding given the 'D'. The Quilter absolutely is Class D. Class A/B is also SS and the precursor to Class D. It tends to be a heavier power module than Class D and a lot of folk attribute it to having more 'heft'. Then there is the 'Trans class' (Mosfet) SS which my Mesa M6 is, but I lump that in with Class A/B to keep it simple in my head! I guess the key feature of Class D is the clear combination of light weight and power. Which is why they have taken the amp world by storm and left bass valve amps and class A/B amps to folk who appreciate the finer things in life. And I'm definitely not knocking them, but my back has had a big say in things... MOSFET is just a different type of transistor it stands for Metal Oxide Silicon Field Effect Transistor. Like valves and bipolar transistors, it can be used in class A, A/B, B, D G or H amps. 1 Quote Link to comment Share on other sites More sharing options...
Chienmortbb Posted May 10, 2019 Share Posted May 10, 2019 On 08/05/2019 at 17:41, Stub Mandrel said: Yes, if the criteria for digital is that something that works by having only an 'on' and 'off' state is digital, it is a fair point. Actually class D amps switch between three states you could call 1, 0 and -1. Personally, although class D amps lend themselves to direct digital control, I wouldn't class them as any more digital than PWM motor controllers (in fact I am sure you could use them as voltage controlled motor controllers if they are modified to be DC coupled). The point about Class D is that it uses Pulse Width Modulation. If is modulated then amplified and demodulated ( yes it is a form of Modem) I would argue that the PWM output is analogous to the input signal In the same way FM Radio is. It never enters the digital domain. Of course the PWM section could be digitally controlled but that does not make it a digital amplifier as the signal is not digitally processed. Some people think that as digital systems are switching systems, that the switching aspect of class D must be digital. While both are non-linear they are not both digital, Thr French use the word Numerique instead of digital. That is because digital processing is based on the binary or octal numbering systems. 2 Quote Link to comment Share on other sites More sharing options...
la bam Posted May 10, 2019 Share Posted May 10, 2019 Looks like the Quilter might be class B. Quote Link to comment Share on other sites More sharing options...
chris_b Posted May 10, 2019 Share Posted May 10, 2019 Who cares about this stuff. . . . what does it sound like and is it loud enough? 1 Quote Link to comment Share on other sites More sharing options...
Lozz196 Posted May 10, 2019 Share Posted May 10, 2019 1 hour ago, chris_b said: Who cares about this stuff. . . . what does it sound like and is it loud enough? That’s about as advanced as I get Chris, and seems to have worked ok so far 😁 1 Quote Link to comment Share on other sites More sharing options...
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